1999 – Sustainable Development in Large Hydro Power Generation
A. Stephen
Among the major energy options, Large Hydro Power is considered to be the front ranking and renewable. But, in most of the developing countries including India, the large multipurpose dam
projects are shrouded in controversies.
This paper, while dealing with positive and negative impacts of large multipurpose dam projects, Jocuses on Social Impact Assessment’ and its mitigatory measures, for the success of the project. The Environment cost as well the Human cost of such projects should be judiciously integrated in the project cycle from its conception to its post implementation stage, for sustainable development of this
power regime.
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Papers 1999
1999 – Alamo Dam Demonstration Risk Assessment
Learn moreDavid S. Bowles, Loren R. Anderson, Joseph B. Evelyn, Terry F. Glover and David M. Van Dorpe
A demonstration risk assessment was conducted on the 283-foot high rolled-earthfill Alamo Dam as part of a U.S. Army Corps of Engineers (USACE) Research and Development program. The existing dam and 19 structural risk reduction alternatives were evaluated for flood, earthquake and normal operating conditions. The paper summarizes the risk assessment process, results, findings and recommendations. It also provides an evaluation of the risk assessment process and recommendations for better positioning the USACE to use risk assessment for dam safety evaluation and decision support.
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Papers 1999
1999 – The Kelian Waste Storage Dam for the Prevention of Acid Rock Drainage
Learn moreP. J. N. Pells and M. Hunter
The potential for generating acid leachate from waste dumps is a major consideration in many metalliferous and coal mines. This paper describes the construction of the highest embankment dam in Indonesia for the sole purpose of storing potentially acid producing waste under water. The paper discusses the features of embankment dam design peculiar to an open pit mining environment which involves moving more than three times the total volume of earth and rock than in the whole of the Snowy Mountains Scheme.
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Papers 1999
1999 – Dam Safety in a Corporate Environment
Learn moreGarry Meinck, Chris Elliott and Tony Moulds
This paper describes the experiences of a former state statutory authority in the almost four years since it became corporatised to form a water utility with a fully commercial orientation and with a new board of management with a clear awareness of the responsibilities of corporate governance.
The need to commit to major remedial work at one of the principal dams focussed the Board’s attention on the safety status of all of the Corporation’s 56 referable dams.
In the absence of external dam safety regulation the Corporation has moved to satisfy its corporate governance responsibilities by adopting current best practice in dam safety. Key elements in this process were:- Setting up a high level steering committee, comprising key stakeholders, to manage a dam safety program.
- Clarifying accountabilities for dam custodianship and technical support.
- Fully implementing the recommendations of the ANCOLD dam safety management guidelines, with its implications for documentation of procedures, frequency of dam inspections, formal safety reviews and contingency planning.
- Communicating the dam safety risk issues to the Board, which has become fully aware and actively interested in the dam safety program.
- Adopting a policy of early risk reduction aimed at clearing up all known significant dam deficiencies within seven to ten years. The Board has approved in principle a program of capital expenditure potentially amounting to some $150 million over the next seven years,
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Papers 1999
1999 – Using Contracts for Life Cycle Risk Management of Dams and Other Infrastructure Assets
Learn moreD.C. Green
Contracts are usually thought of as documents which set out the respective legal obligations of the contracting parties. If the focus is changed, however, away from closing legal loopholes to the use of contracts to achieving project management objectives, then, among other things, contracts may be drafted as an integral part of the risk management plan for particular infrastructure assets.
In this paper, where the emphasis is on dam projects, the principles of risk management are applied to contracts for construction, maintenance and surveillance and outsourced technical advice, thereby covering issues over the whole life cycle of the asset. The principles are then broader issues of project procurement. Such as selection of contractor, contract packaging, ,clauses within the contract and administration of the contract.
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Papers 1999
1999 – Remedial Works in Cotter Dam and the Risk to there from Floods.
Learn moreJavad Tabatabaei! and Christopher Zoppou
Cotter Dam was constructed in 1912 to 19m and was raised to 31m in 1949. Due to its close proximity to a popular recreational resort, it is considered as a high hazard dam. It forms a storage with a capacity of only 4500ML and receives flows from a catchment area of 482km?. Concern about the ageing and structural integrity of Cotter Dam was expressed as early as 1967. There has also been a major revision of the Probable Maximum Flood (PMF) and new earthquake requirements for the dam. All these factors have contributed to the decision to undertake remedial works on the dam. The remedial work could be interrupted by flows over the spillway. This would increase the cost of the works because the construction equipment must be removed and reinstated (de/remobilisation) when there are flows over the spillway. Additional costs are also incurred for each day the construction equipment remains idle (standby). The total tender price therefore includes the cost associated with the remedial work as well as any standby and de/remobolisations. Risk analysis was used to establish the frequency the reservoir water level exceeds the spillway level. The risk analysis was used to select the successful remedial works tender.
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